[Pidgin] #14753: Implement MSNP18 in libpurple

[Pidgin]

#14753: Implement MSNP18 in libpurple
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 Reporter:  basjuh                       |        Owner:  QuLogic
     Type:  enhancement                  |       Status:  new    
Milestone:  Patches welcome              |    Component:  MSN    
  Version:  2.10.0                       |   Resolution:         
 Keywords:  msnp18 p2p p2pv2 slp groups  |  
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Comment(by Darkstrike):

 Just a bug report - at least for me on two computers running Win7 64-bit
 and WinXP 32-bit - since the new protocol update, I'm having instances
 where I'll go to chat to a user Pidgin says is online and once I send my
 message I receive a an error on how the message could not be sent because
 the user is offline. If I then close and restart the program, or disable
 and re-enable that protocol plugin, that person will then show as offline
 like they actually are and Offline Instant Messages will work fine. It
 seems the contact list isn't updating properly for me to show who is
 online or offline?

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Ticket URL: <http://developer.pidgin.im/ticket/14753#comment:33>
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